It seems this version doesn't work very well for "direct(O_DIRECT) sequence read" mode.For example, you can create group A and group B, then assign weight 100 to group A andweight 400 to group B, and you run "direct sequence read" workload in group A and B simultaneously. Ideally, we should see 1:4 disk time differentiation for group A and B. But actually, I see almost 1:2 disk time differentiation for group A and B. I'm lookinginto this issue.BTW, V3 works well for this case.